As long as it is not plugged in or connected to power and on you can leave the doors on your appliances open.
I would obviously remove any food and things from them before you leave them sitting though!
Leaving them cracked to let air flow get in will not hurt your appliances.
You can also invest in some Odor1 Storeaze 30 to 90 Day Odor Eliminator for RVs 20' to 40' Long # DR53FR or the Odor1 Storeaze 30 to 90 Day Odor Eliminator for Single Rooms - Qty 1 # DR36FR view full answer...
Per Odor1, the Odor1 Storeaze 30 to 90 Day Odor Eliminator # DR53FR, as well as their other products, leave no residue that could harm your electronics. Odor1 products have been tested in RV's with no issues found with electronics so you should not have any problems. Whenever your RV is in storage the gas and power should be shut off to avoid any possibility of a gas leak or electrical fire and I'll typically leave the fridge door propped open to help air it out. As long as you follow the... view full answer...
No, there's no problem with having an O-ring on the end of your POL fitting like the Propane Hose - POL Pigtail x 1/4" Male Inverted Flare - 20" # 37207-30625. The O-ring is going to help eliminate the odor you're smelling by helping form a tighter seal. view full answer...
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